Re: CNC interface PCB

Carlos,
Sorry this answer took a day. I posted an answer last night, but for
some rason it didn't seem to post. Any way, yes,that sounds about
right for the traces for the high power. If you go
to:
http://www.balboa-instruments.com/balboa_direct/catalog.html
then, Ignore the login request and click on go to catalog. when the
window opens, select circuit boards from the table of contents.
several pictures of these boards will open. You will notice that the
boards have several large "fingers" extending off one side, these
fingers carry the high power traces and are designed to line up
perfectly with a terminal strip. you will notice that the relays are
right next to the fingers, that is becausethe 220 is carried in on a
set of fingers,then through the relay and right back out on another
set of fingers. The other relays you see on the board control lower
amp Items so they aren't right next to the fingers.
Hopefully this info will be of help to your application.
Thanks
Dale
---
In CAD_CAM_EDM_DRO@y..., "Carlos Guillermo" <carlos@v...> wrote:

> Hi Dale -
>
> Thanks for the info. I've been getting good help on the relays,
> but now I'm especially looking for info like you offered about
> switching 23A with PCB-mounted relays. Is that 23A being carried
> directly by the PCB traces? According to the chart I downloaded,
> with a 20deg C rise and 2oz copper, that would require about .350"
> wide traces. Does this sound familiar?
>
> TIA,
>
> Carlos Guillermo
> VERVE Engineering & Design
>
> -----Original Message-----
> From: aspaguy [mailto:spaguy@l...]
> Sent: Monday, February 11, 2002 11:10 PM
> To: CAD_CAM_EDM_DRO@y...
> Subject: [CAD_CAM_EDM_DRO] Re: CNC interface PCB
>
> Carlos,
> When I'm not playing with cnc stuff I support the habit with my
> spa
> repair company.(Hence the A-spa-guy handle) While this may seem to
> be
> a bit off topic, it may come into play here. newer hot tubs
> routinely
> use pc boards and pc board mounted relays to handle 220 volt AC
> 5.5kw
> heat elements.(they generally amp out at about 23-24 depending on
> actual supply voltage). I did a little checking and the relays can
> be
> purchased through spa parts plus (800-521-7587) I can get them
> from
> some other distributors too but these guys have a great tech
> support
> that could help you with coil voltages etc. as this info is kinda
> sketchy in their catalog. Also, I believe SPP will talk to the
> general public, where many others won't if your not in the
> business.
> Normally I like that, but in your case SPP may be the ticket.
> Happy Hunting
> Dale
>
>
> --- In CAD_CAM_EDM_DRO@y..., "Carlos Guillermo"
> <carlos@v...> wrote:
> > Hi All -
> >
> > I'm working on a custom interface board for my controller, and I
> > have some questions regarding power capacity of PCB traces. I
> > would like to use an isolated corner of the PCB for some relays
> > for energizing external devices (coolant pump, air cylinders,
> > etc.) as well as possibly cutting power to the Gecko's under
> > estop. ....................